Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4850334 | Inner ceramic tube in particular for a glove finger-shaped radiant tube for recirculation An inner tube for a radiant tube for recirculating burnt gases supplied by a burner, consisting of a plurality of axially aligned assembled tube sections arranged end to end whereas the assembling means consist each one of a sleeve coaxially surrounding t... | 07/25/1989 |
| 4848315 | Apparatus for supplying heated air to an air system An apparatus for supplying heated air to an air stream including a first air flow duct having an inlet and an outlet, a blower for forcing air through the duct to the first duct outlet, and a second air flow duct having an inlet, an outlet, and a burner c... | 07/18/1989 |
| 4823768 | Radiant heater The present invention provides a high output radiant heater which uses a heat exchanger to obtain a variety of types of heat from a single power source. The heater is comprised of a housing; a combustion chamber in the housing, the combustion chamber defi... | 04/25/1989 |
| 4753217 | Chambered gas fired convection heater The invention provides a compartmented gas fired heater in a cabinet-type outer stove casing. The outer stove casing has a downwardly positioned covered bottom with adjustable legs at four corners and an upwardly positioned opened top edge. A heat chamber... | 06/28/1988 |
| 4714073 | Heating apparatus operating with gaseous fuel and designed to be connected to a smoke pipe A discharge pipe is directly associated with one of the main heat exchange walls of a monoblock heating body, and a backflow damping device comprises two siphons placed symmetrically on either side of the pipe, each having a passage above the level of the... | 12/22/1987 |
| 4682578 | Infrared radiant heater An infrared radiant heater comprising a burner for moving combustion supporting air over an exhaust flue gas transfer pipe toward the fuel nozzle which is spaced from the blower. A first cone of high temperature resistant metal positioned at said nozzle t... | 07/28/1987 |
| 4586484 | Space heater for small compartments A space heater for small compartments in which the burner is received in an upwardly open tray bottom which has an outwardly extending flange connected to an outwardly extending flange at the lower end of the combustion chamber. The tray has a lateral ope... | 05/06/1986 |
| 4432336 | Energy conversion system A system for the transmission and conversion of the potential energy of hydrocarbon fuels to available heat, power and light. The system is particularly adapted for use with natural gas, artificial gases or any of the LPG fuels such as propane, butane, et... | 02/21/1984 |
| 4421095 | Room heating apparatus for small spaces A room heating apparatus for small spaces adapted to be fired with a gaseous or vaporized liquid fuel, especially for mobile homes, has a combustion gas channel with an upper horizontal cross channel serving as a heat exchanger. Outer fins (12, 20) projec... | 12/20/1983 |
| 4353348 | Energy conversion system A system for the transmission and conversion of the potential energy of hydrocarbon fuels to available heat, power and light. The system is particularly adapted for use with natural gas, artificial gases or any of the LPG fuels such as propane, butane, et... | 10/12/1982 |
| 4240400 | Space heater A room space such as a caravan is provided with a gas fired space heater having an upright casing within which is located a sealed surface combustion unit having a radiant plaque on one side of which gas is burnt. Primary and secondary air for combustion ... | 12/23/1980 |
| 4171947 | Catalytic fuel combustion apparatus and method A flameless catalytic combustion apparatus includes a combustion chamber with a hydrogenous fuel inlet and a mass of catalyst in the chamber between the inlet and an outlet. Preferably the catalyst mass comprises porous pellet bodies supporting varying hi... | 10/23/1979 |
